Yield Enhancement in Magnetized ICF Targets Using Low-Adiabat Pulse Shapes on OMEGA

We present the latest experimental data of neutron yield and ion-temperature enhancements obtained by magnetizing the hot spot of inertial confinement fusion (ICF) implosions. The capsules are 23-$\mu $m plastic shells filled with 11 atm of D$_{2}$ gas. The laser pulse is shaped to drive the shell on an adiabat of $\sim $2 and the $\sim $7-T seed magnetic field is produced using a single coil. The initial seed is predicted to be compressed to $\sim $20 MG---enough to magnetize the electrons in the hot spot and reduce the heat conductivity. Six null shots (without field) and six shots with B-fields were conducted. Four of the B-field shots show a yield and temperature enhancement of about $\sim $23{\%} and $\sim $10{\%}, respectively, in agreement with the predictions of 1.5-D and 2-D magnetohydrodynamic simulations. Those results are similar to previous experiments reported in.\footnote{P. Y. Chang \textit{et al.}, Phys. Rev. Lett. \textbf{107}, 035006 (2011).} Two of the B-field shots produced an anomalously high yield enhancement of 80{\%} and 200{\%}. Additional experiments are required to verify these anomalous results. Compressed field measurements using a high-energy proton backlighter are proposed and preliminary data from one field-measurement experiment will be presented. This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0001944 and DE-FC02-04ER54789 (Fusion Science Center).